I have also been successful with keeping the tip down. The way I see it is that it is easier for a fish to jump with the line pressure coming up and out of the water than even or below the water level. Once a fish is out of the water, it has lost its buoyancy and actually weighs more relative to the line. Think about it. How many fish have broken off after it has been removed from the water. I believe the key to more landed fish is to keep it in the water, and preferably in a deeper pool until it tires. If you try to fight a fish in shallow water it can use the bottom as added "traction" and give the fish another advantage to try to do bad things to your leader. Of course this is my own opinion and I have a very limited amount (if any) of scientific data to support this.
As much fun as it is to watch the fish jump, I don't want to see that fish until it is pooped out and easier to handle out of the water.